When combining two independent clauses, a comma must be placed

1)what was the first thing that cast doubt on the authenticity of the king being peter wilks's english brother? a)his refusal to answer questionsb)his arrival in town in a canoec)his illiteracy and inability to writed)his lack of knowledge about the wilks family 2)how did huck escape the clutches of the angry townspeople? a)he told them where the gold was. b)he ran off while digging up the body. c)his captor released him while running to see the gold. d)his captor sent him away because he did not want to share the gold.

Select the sentence using an appositive to further explain the subject. the water is cold, but the sand is warm. mr. miller, the dean of the school, makes you feel very humble running in the relay, bob tripped and fell.

During editing and proofreading, you do not need to a. check facts b. follow grammar, usage, and mechanics c. scrutinize spelling d. revise overall structure