As the first verb is in past indefinite tense/ simple past tense, so in sequence, the second verb should be in the same form.

Explanation:

The correct answer is option B, "Ordered."

Explanation:

In the given sentence, the phrase "As soon as I arrived" indicates that the action of arriving happened before the action of ordering the food. This suggests that the past tense is needed to describe the action of ordering.

The phrase "everyone had waited for me" further supports the use of the past tense. The past perfect tense, "had waited," indicates that the waiting occurred before the action of ordering.

Therefore, the correct tense to use in this sentence is the simple past tense, which is "Ordered."

Example:

- As soon as I arrived, we ordered our food - everyone had waited for me.

Alternative options:

Let's also analyze the other options to understand why they are incorrect:

a) Were ordering: This option is in the past continuous tense, which indicates an ongoing action in the past. However, the sentence suggests that the action of ordering happened after the arrival, so the past continuous tense is not suitable here.

c) Had ordered: This option is in the past perfect tense, which indicates an action completed before another action in the past. Although the phrase "everyone had waited for me" supports the past perfect tense, the use of "As soon as I arrived" suggests a sequential order of events, making the simple past tense more appropriate.

d) Would order: This option uses the modal verb "would," which is used to indicate a future action in the past or a habitual action in the past. However, in this sentence, the action of ordering occurred immediately after the arrival, so the use of the modal verb "would" is not appropriate.

Therefore, the correct answer is option B, "Ordered."