[QA] “You’d better stay at home during this time,” he said to Lan.

Question:

“You’d better stay at home during this time,” he said to Lan.

• A.
  He ordered Lan to stay at home during that time.
• B.
  He warned Lan against staying at home during that time.
• C.
  He advised Lan to stay at home during that time.
• D.
  He thanked Lan for staying at home during that time.