What did the Roman army first build across the country when they came to Britain

A. Commodities that people are in constant need of．
B. Goods that are convenient to use or purchase．
C. Items that people tend to buy under impulse．
D. Items that have to be bought once a week．

A. At 10:00 AM.
B. At 2:00 AM.
C. At 12:00 PM.
D. At 10:00 PM.