[Plugin: Contact Form 7] Conditional Redirect for Submit Button

I am new to WordPress, so I need some help with code, please!

On my website I have completed a form to solicit donations using Contact Form 7 and redirected the Submit button to a customized PayPal page. I am asking people to select a checkbox for a donation amount on the website form; however, since the donation amounts vary, PayPal is currently set up without a pre-determined donation amount. Though it seems redundant, I want to keep the information on the form because it gets sent to me by email, so I need to redirect to different pre-populated PayPal pages based on which Donation Amount they select.

Here’s my website: https://96.125.173.235/~hopetuto/donate-now/

Essentially here’s what I want to happen on the form:

They select from the following options in a checkbox:
A
B
C

And the code does the following:

If A is selected link to URLA upon submission

If B is selected, link to URLB upon submission

And so on…

Any help would be much appreciated!!!