Answer:
B. He is legally committed to following the guidelines set by his employer.
Step-by-step explanation:
David's signature on the document indicates that he is not allowed to share any confidential information about Company A to anyone outside his work. His signature makes the contract legal that he agrees to following the guidelines. This makes choice B correct.
The paragraph did not mention about David's obligation to revise the contents of the handbook. This makes choice A incorrect.
The paragraph did not mention about his obligation to stop other employees from sharing the confidential information. It only talks about his obligation alone not to share the information about Company A outside. This makes choice C incorrect.
The paragraph indicated that David should adhere/follow the rules which have been put into writing on the handbook and not the other way around. This makes choice D incorrect.