Kenny Is Writing a Persuasive Speech on the Existence of Extraterrestrial

kenny is writing a persuasive speech on the existence of extraterrestrial or alien life. His thesis is "Extraterrestrial life is a fact, backed up by extensive scientific study and government involvement". After doing his research, however, Kenny feels he cannot support his original thesis, so he rewrites it to state, "Extraterrestrial life has been a hot topic for debate for decades, with a lot of speculation and very little proof". Kenny is following what guideline for crafting his thesis?

A) Make a statement.
B) Keep it exciting.
C) Be concrete.
D) Tell the truth.