<span>My worst problem is the inability to speak clearly in public. <em>This </em>is not true when I am with my family.</span> The pronoun reference "this" in the sentence is used incorrectly because it used to refer to the whole sentence before it. It implies that the antecedent is "<span>My worst problem is the inability to speak clearly in public."</span> However, the readers don't know which part of that statement "is not true when I am with my family". Is the problem not true? Is the inability to speak clearly in public not true? The antecedent is vague, and we can say that (3) there's no specific antecedent.
Cultural evolution is an evolutionary theory of social change. It follows from the definition of culture as "information capable of affecting individuals' behavior that they acquire from other members of their species through teaching, imitation and other forms of social transmission
I'd say 1.A
And 2.C are the correct answers