Dear Europcar, if you want my feedback, you should make it easy.

I’m giving you information to improve your business. If I don’t want to provide my phone number to you, you should not force me to by producing the error:
Please provide an answer to all questions before submitting.

Because:

• I’m doing you a favour by replying.
• I don’t want you to give me a call, about the average customer service.
• In any case, you already have my number (from the rental agreement).

On this day..

• Lately been thinking about a recumbent trike - 2010
• They don't make networks hubs anymore - 2008