持票人应当自收到被拒绝付款的有关证明之日起一定期限内，将被拒绝事由书面通知其前手。该期限是（）

A.3日

B.5日

C.7日

D.10日

The 12-foot low-velocity fog applicator（）.

A.has a spray pattern 12 feet in diameter

B.can be used in conjunction with both 1-1/2 inch and 2-1/2 inch all-purpose nozzles

C.has a 90°bend at its discharge end

D.has a screw thread end which connects to the all-purpose nozzle