My plan to have a new car fell through because of the price rise. A. was completed B. was completed with difficulty C. was postponed D. failed to materialise

The correct answer is D. failed to materialise.

The other options are incorrect because:

• A. was completed is incorrect because the plan did not come to fruition.
• B. was completed with difficulty is incorrect because the plan was not completed at all.
• C. was postponed is incorrect because the plan was not put on hold, it was abandoned.

The sentence “My plan to have a new car fell through because of the price rise” means that the plan did not succeed. This could be because the price of cars rose so much that the plan was no longer affordable, or because the plan was abandoned for another reason.