A Pipe $28$ Ft Long Is Cut into Four Pieces, the First

Multiple Choice

A pipe $28$ ft long is cut into four pieces, the first $3$ ft long, the second $5$ ft long, and the third $7$ ft long. What is the length of the remaining piece? (Assume no waste from cutting.)

A) 18 ft
B) 23 ft
C) 16 ft
D) 20 ft
E) 13 ft