Marconi assembled the radio.

Options

A. discovered
B. made
C. invented
D. No Improvement

Answer

C

Explanation

(3) invent (Verb.) : to produce or design something that has not existed before
assemble (Verb) : to bring things together as a group
• The shelves are easy to assemble.
discover (Verb) : to be the first person to become aware that a particular place or thing exists
• Scientists are working to discover a cure for AIDS.
make (Verb.) : to create/prepare something by putting parts together
• The steam engine was invented by James Watt.
Here, invented is the right usage