I do believe it is A. if
I hope this helps ^-^
According to this excerpt, I can infer that the option A is the correct answer: Most people think that the most effective flag desings are the simplest.
A research paper from a expert since a expert is more credable then anything else
1. the second one 2.the second one 3. not sure but I think its the first one 4. the first one 5. not sure but I think its the second one
