Select the option that expresses the given sentence in passive voice.

She baked a large blueberry cake.

A large blueberry cake was baked by her.

The correct passive voice form of the given sentence "She baked a large blueberry cake" is A large blueberry cake was baked by her.

The active voice of the sentence is "She baked a large blueberry cake." This sentence is in the simple past tense, which is used to describe an action that happened in the past. The passive voice of the sentence is formed by putting the subject of the active sentence after the verb "to be" and the past participle of the main verb. In this case, the subject of the active sentence is "she" and the main verb is "bake." The past participle of "bake" is "baked." So, the passive form of the sentence is "A large blueberry cake was baked by her."

The other options are incorrect because:

• A large blueberry cake is being baked by her." This sentence is in the present progressive tense, which is used to describe an action that is happening now but is not finished. However, the action of baking a large blueberry cake happened in the past.
• A large blueberry cake has been baked by her." This sentence is in the present perfect tense, which is used to describe an action that has happened in the past and is still relevant to the present. However, the action of baking a large blueberry cake is not happening now.
• A large blueberry cake is baked by her." This sentence is in the present tense, but the action of baking a large blueberry cake is not happening now.