使用What are these/those?问答 — 英语选择题

在农场，身边篮子里装着胡萝卜，远处筐里装着西红柿。选出合适的问句。—___? —They’re carrots. —___? —They’re tomatoes. A. What are these / What are those B. What are those / What are these C. What is these / What is those D. What are this / What are that