Concept:
- Idioms formed with 'carried' change meaning completely depending on the word that follows it.
- 'Carried away by' means to become so affected by an emotion or feeling that one loses normal restraint.
- 'Carried along' only means moved forward together with something, it does not describe an emotional reaction.
- 'Carried down', 'carried off' and 'carried forward' are unrelated idioms used for transporting, taking away, or postponing something.
Step 1: Read the sentence for meaning.
The man heard an inspiring speech and, as a result, felt strongly affected by the designer's enthusiasm.
The sentence needs an expression that shows he got emotionally swept up.
Step 2: Check the underlined phrase against this meaning.
'carried along by former's' does not correctly express being emotionally influenced by someone's enthusiasm.
The standard idiom for this exact situation is 'carried away by'.
Step 3: Eliminate the other options.
'got carried down' and 'got carried off' both suggest physical removal, not emotional influence.
'got carried forward' means postponed or continued to the next stage, which has nothing to do with feelings.
Final Answer: got carried away