Correct Answer: keep

Solution : The correct choice is the fourth option .

In this sentence, the word keep would be used to express the unintentional action of causing a group of people to wait. It implies the continuation of a situation—in this case, causing others to wait.

The meanings of the other words are as follows:

• Creep : This means to move slowly, quietly, and cautiously.
• Make : This is a versatile word with various meanings. In this context, "make" doesn't fit well because it doesn't convey the intended sense of causing people to wait unintentionally.
• Seep : This means to flow or pass slowly through small openings or spaces.

Therefore, the complete sentence would be: "We didn't mean to keep all of you waiting."