The correct answer is B. Incidentally.
Explanation
Linking Words are words that are used to relate ideas within a paragraph. To select the appropriate linking word it is necessary to know the context of the sentence to give cohesion and coherence to the text. In the sentence presented, the appropriate linking word is "incidentally" because the idea "wearing certain colors may also attract mosquitoes" acts as a complementary information and the linking word "incidentally" can be used to add ideas. So, the correct answer is B.
D. What prior knowledge does my audience have?
You would teach a kindergarten class about animals differently than you would a group of zoologists. <span />
D an opinion expresses how someone feels about something while a fact can be proven
B.B is the correct answer because of the grammar.