单选题

The company will ______ to its agreement, no matter how costly the process may be.
A. retain B. alter
C. abandon D. adhere
【正确答案】 D
【答案解析】句意：该公司将信守协议，不论这一过程的代价有多大。adhere坚持，与to构成常用词组；retain保持，保留；alter改变；abandon放弃，遗弃。