Choose the word or phrase that best fits the blank space in the following passage

A. careful

B. hard

C. bored

D. boring

A. told

B. explained

C. spoke

D. said

A. clue

B. answer

C. result

D. key

A. in

B. on

C. out

D. of

A. right

B. wrong

C. sad

D. incorrect

A. is

B. are

C. was

D. were