Correct Answer:
Option B - Option 'b' is correct. In the given sentence main verb be must with s/es because, subject is in singular noun and tense in present indefinite tense so, the correct sentence is– The sudden rise and fall of prices makes a business very uncertain.
B. Option 'b' is correct. In the given sentence main verb be must with s/es because, subject is in singular noun and tense in present indefinite tense so, the correct sentence is– The sudden rise and fall of prices makes a business very uncertain.