Which of the following is an example of a grammatical utterance during the two-word stage?

The correct example of a grammatical utterance during the two-word stage is "Suzy juice." In this phase of language development, children typically start combining two words to convey simple ideas or actions.

The utterance "Suzy juice" demonstrates this combination effectively, as it implies possession or relation, suggesting that Suzy has juice or wants juice. It's a clear formation that adheres to the grammatical structures children are beginning to grasp, focusing on noun-noun combinations.

In contrast, while "Daddy eat cake," "Jenny sleepy," and "Hello there" may also reflect early language attempts, they do not exemplify the typical two-word structure as effectively. The first demonstrates a verb and noun but is more complex than the straightforward noun-noun pairing important in the two-word stage. "Jenny sleepy" implies a state, which can be a bit more advanced, and "Hello there" represents a greeting rather than a direct combination of ideas or actions, not fitting the two-word stage criteria of straightforward syntactic structure.