Lynn is looking for a synonym to use in her essay, so she opens the thesaurus. She looks up the following entry.

delay v. 1. Storms delayed the construction process. curb, detain, hamper, hinder, hold. 2. He delayed his admission until he got back from Europe. postpone, hold, put off, shelve. 3. Don’t delay, the sale is almost over. hedge, hang back, hesitate, pause, stall

Lynn is writing a news article for the school paper. She wants a synonym for “delay” that says the principal’s signature is delaying the arrival of the new vending machines. Which is the best synonym for her to use?