First of all, of course, word is relatively simple. As long as you have a computer, you can turn it on at once. Even if office is not installed, WordPad can simply handle it, which is very efficient for readers.

Pdf, on the other hand, is slow to open, and sometimes it is necessary to install supporting software (not the most commonly used).

But once word is opened, it is easy to change it. Pdf is stable, but it is difficult for others to change it.

If possible, make a copy and submit it.