Which pronoun correctly fits in this sentence: We arranged the fruits and flowers and placed __________ in the center of the table.

In the given sentence, the context indicates that "the fruits and flowers" have been arranged and are being referred to collectively as a single entity. The correct pronoun "them" accurately reflects this plurality, as it signifies that both the fruits and flowers are being placed together in the center of the table.

Using "them" effectively refers back to the previously mentioned group, aligning with standard English grammar practices for pronoun usage when the antecedent (the noun being replaced) is plural. Therefore, "them" is the appropriate choice because it maintains coherence within the sentence structure while accurately referencing the items in question. The other pronouns do not match the plural nature of the antecedent, making them unsuitable for this context.