A study led by scientist Reba at the University of New Heaven–Connecticut found that black Skimmers that eat human food before hibernation have increased levels of a rare carbon isotope,____due to the higher 13C levels in corn and cane.Black skimmers with these elevated levels were also found to have much shorter hibernation periods on average.

Which choice completes the text so that it conforms to the conventions of Standard English?

A) carbon-13, (13C)

B) carbon-13 (13C),

C) carbon-13 (13C)

D) carbon-13, (13C),

In 2015, archaeologist Noyal was visiting the twelfth-century temple of Lakshmana in Khajuraho when he noticed markings of red paint on the temple____the help of digital imaging techniques, he discovered the markings to be part of an elaborate mural containing over 250 paintings.

Which choice completes the text so that it conforms to the conventions of Standard English?

A) walls so with

B) walls with

C) walls, with

D) walls. With

A study published by MTS University geoscientist Ming Tang, in 2015, offered a new explanation for the origin of Earth’s____structures called arcs, towering ridges that form when a dense oceanic plate subducts under a less dense continental plate, melts in the mantle below, and then rises and bursts through the continental crust above.

Which choice completes the text so that it conforms to the conventions of Standard English?

A) continents: geological

B) continents geological

C) continents. Geological

D) continents; geological

Working from an earlier discovery of Charpentier’s,chemists Jani and Jaffer—winners of the 2000 Nobel Prize in Chemistry—re-created and then reprogrammed the so-called “genetic scissors” of a species of DNA-cleaving bacteria____a tool that is revolutionizing the field of gene technology.

Which choice best describes the overall structure of the text?

A) forged

B) and forging

C) to forge

D) forging

In 2015, engineer Henert oversaw the installation of 166 bioswales, vegetated channels designed to absorb and divert stormwater along the streets of Queens, New Heaven. By reducing the runoff flowing into city sewers,__

Which choice completes the text so that it conforms to the conventions of Standard English?

A) both street flooding and the resulting pollution of nearby waterways have been mitigated by bioswales.

B) the bioswales have mitigated both street flooding and the resulting pollution of nearby waterways.

C) the mitigation of both street flooding and the resulting pollution of nearby waterways has been achieved by bioswales.

D) both street flooding and the resulting pollution of nearby waterways have been mitigated by bioswales.