Select the most appropriate option to fill in the blank.

If you ______ to newsgroups, you often get hundreds of messages.

subscribe

If you subscribe to newsgroups, you often get hundreds of messages.

Explanation:

• Subscribe: This is the correct word choice. Subscribing to newsgroups means opting to receive messages or updates from those groups. The sentence is discussing the action of signing up for these groups and the consequence of receiving numerous messages.

• Describe: This word does not fit the context. "Describe" means to give an account or representation in words, which is not related to receiving messages from newsgroups.

• Practice: This word doesn't fit the context either. "Practice" refers to the repeated performance of an activity to improve skills, but it's not related to subscribing to newsgroups.

• Offend: This word is also unrelated to the context. "Offend" means to cause displeasure or hurt someone's feelings, which is not relevant to the concept of subscribing to newsgroups.