Convert the following sentence into active voice.

Let the press conference be convened immediately without delay.

The correct option is Convene the press conference immediately without delay.

Understanding Passive and Active Voice in Imperative Sentences:
The given sentence is: "Let the press conference be convened immediately without delay."
This is an imperative sentence in the passive voice, which follows the structure: Let + Object + be + Past Participle (V3).

Rules for Conversion to Active Voice:
1. Imperative passive sentences starting with "Let" express an order, command, or request.
2. To convert this into active voice, remove "Let" and the auxiliary verb "be".
3. The main verb changes from its past participle form (convened) to its base form (Convene) at the beginning of the sentence.
4. The active voice structure for an imperative command/request is: Base Verb (V1) + Object + Adverbial/Remaining details.

Step-by-Step Conversion:
• Base Verb (V1): Convene
• Object: the press conference
• Time/Manner phrase: immediately without delay

Putting it all together, the sentence in active voice is: "Convene the press conference immediately without delay."