|Question 16Verbal

Source Texts

Text
Bertie Marshall, a key figure in the history of steel band music in Trinidad and Tobago, made several innovations to the steel ________ so the instrument could be easily transported during Carnival, a cover to protect the pans from the sun, and amplification so the sound of the pans could be better heard over large crowds and other instrumentation.
Which choice completes the text so that it conforms to the conventions of Standard English?
drum,
A
drum;
B
drum
C
drum:
D