Question

the development of high - temperature superconductors not only transformed condensed matter physics but also opened new possibilities for energy transmission. studies demonstrating that these materials conduct electricity without resistance at relatively higher temperatures highlight ____ potential for revolutionizing power grids and magnetic levitation systems.
17
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which choice completes the text so that it conforms to the conventions of standard english?
a its
b it’s
c their
d there

Explanation:

To solve this, we analyze the pronoun needed. The subject "these materials" (plural) requires a plural possessive pronoun to refer to their potential. "Its" is singular possessive, "it’s" is "it is", and "there" doesn't fit as a possessive. "Their" is plural possessive, matching "these materials".

Answer:

C. their