Besides making a promise he kept it.
Select the correct alternative that transforms the above sentence into a compound sentence.

The correct answer is Option A (He not only made a promise, but he also kept it.).

Key Points:
• The given sentence 'Besides making a promise he kept it' is a simple sentence using a prepositional phrase ('Besides making...').
• To convert it into a compound sentence, we use cumulative correlative conjunctions such as 'not only... but also' to join two coordinate independent clauses.
• Clause 1: 'He not only made a promise'
• Clause 2: 'but he also kept it.'
• In Option 2, the parallel structure is violated because 'Not only' is placed before the subject 'he' while 'but also' precedes the verb 'kept'.
• Therefore, Option 1 is grammatically sound, parallel, and correct.
• Key Takeaway: 'Besides + -ing' in a simple sentence transforms into 'not only... but also' joining two finite clauses in a compound sentence.