<p>A. Cities environmental problems
B. City’s environmental problems
C. Citys’ environmental problems</p>
<p>I think it’s B, but i’m not completely sure.</p>
<p>A. Cities environmental problems
B. City’s environmental problems
C. Citys’ environmental problems</p>
<p>I think it’s B, but i’m not completely sure.</p>
<p>It’s clearly not A, and it’s not C because the plural of city is cities, so if it were referring to multiple cities, it would say “cities’ problems”, and not “citys’”, so the answer is B.</p>
<p>A. A Peoples head
B. A Person’s head
C. A Persons’ head</p>
<p>Thanks cupofjuice. Thanks harry.</p>