Too strong. There’s no support for the “only” major reduction in size occuring 100,000 years ago. We know that there are signs of a reduction 100,000 years ago; but we also know that there has been a reduction “over evolutionary time.” So there may be further reduction more recently than 100,000 years ago, and some of these might be major reductions.

Not supported, because the “high-meat” diet isn’t brought up in P2. It’s brought up in P3 in connection with a discussion of the soft parts of the digestive system. But the question stem asks us what is suggested in the “second paragraph.” In any case, (B) isn’t supported by P3 either because the author doesn’t suggest that humans have difficulty surviving on a high-meat diet. Rather, they have difficulty surviving on a raw-food diet.

This relates to P3. But P2 is about jaw and tooth size, not the human digestive anatomy.

Supported. The author suggests that cooking techniques were modified over time. One example is the development boiling.

Not supported, because nothing in P2 suggests that cooking was adopted by different populations of early humans “at the same time.” Although we do know that populations in different areas did engage in cooking, there’s no evidence the author thinks they all began cooking at the same time.