Select the option that expresses the given sentence in passive voice.
She handles all tasks efficiently.

To convert the given active voice sentence into passive voice, let's analyze its structure step-by-step:

1. Identify the key components of the active sentence:
- Subject: "She"
- Verb: "handles" (This is in the Simple Present Tense)
- Object: "all tasks"
- Adverb: "efficiently"

2. Apply the rules for converting Simple Present Tense to Passive Voice:
- The object of the active sentence ("all tasks") becomes the subject of the passive sentence.
- Since the new subject ("all tasks") is plural and the tense is Simple Present, we use the helping verb "are".
- The main verb "handles" is converted to its past participle form, which is "handled".
- The active subject "She" becomes the agent "by her" at the end of the passive sentence.
- The adverb "efficiently" remains to describe the action.

3. Formulate the passive sentence:
Combining these elements, we get:
"All tasks" + "are" + "handled" + "efficiently" + "by her."
⇒ All tasks are handled efficiently by her.

Therefore, the correct option is: All tasks are handled efficiently by her.