Select the option that expresses the given sentence in active voice.
Four grams of sodium chloride was added to the mixture by the research team.

Correct option is C

The correct active voice of the given sentence is (c) The research team added four grams of sodium chloride to the mixture.
Definitions:
· Active Voice: When the subject performs the action of the verb.
· (e.g., The chef cooked the meal.)
· Passive Voice: When the subject receives the action of the verb.
· (e.g., The meal was cooked by the chef.)
Rules for Conversion from Passive to Active:
1. Identify the subject, verb, and object:
· Passive: Four grams of sodium chloride was added to the mixture by the research team.
· Subject: The research team (doer)
· Verb: was added
· Object: Four grams of sodium chloride
2. Rearrange the sentence:
· Subject + Verb + Object
· The research team added four grams of sodium chloride to the mixture.
Structure:
· Passive Voice: Object + was/were + past participle + by + Subject
· ( Four grams of sodium chloride was added... by the research team.)
· Active Voice: Subject + V2 + Object
· ( The research team added...)