If im correct to me "stay positive" means to have a happy optimistic and overall good attitude to whatever or whoever it may be refering too. "Keep going" in this sentence just means to continue to proceed forward or carry on.
The answer is B. because the peaces move making friction which results in the magnetic field.
Answer:
The purpose of independent agencies and government corporations is to help provide services to the public, handle areas that have become too complex for government to handle and keep the government operating efficiently.