By using signal words to ______ what may come next, the reader can decide whether he should speed up his reading, slow or pause to make sure what is being read is understood.

A. as is produced
B. that produced
C. that is produced
D. produced

A．Self-sufficiency is valued in the US.
B．If one child is unwilling to be responsible for his/her parent, he/she may be hated by his/her brothers or sisters.
C．Some children think that sending their parent to a convalescent hospital can be justified.
D．Actually, all children can contribute an equal share to the cost of their parents car