Choose the option that is the active form of the sentence.

I am sometimes puzzled by her actions.

Her actions sometimes puzzle me.

The correct option that is the active form of the sentence is Her actions sometimes puzzle me.

The other options are incorrect because:

• Her actions were sometimes puzzling me is in the past tense, while the original sentence is in the present tense.
• Her actions are sometimes puzzled by me is in the passive voice.
• She can sometimes puzzle me is in the active voice, but the verb "to puzzle" is followed by a direct object, but the phrase "can sometimes puzzle" is not a direct object.