In order for this solution to be viable, which skill set does the customer team need to possess?

A customer team wants to retarget subscribers who click on links of key items promoted across email campaigns.

The customer has indicated the following:

* Emails will be built using a custom dynamic template for these messages.

* Links will vary over time and across campaigns.

* Click activity will be cross-referenced with subscribers’ regional markets on a master subscriber data extension.

* Retargeting messages will dynamically populate content based on regional market.

In order for this solution to be viable, which skill set does the customer team need to possess?
A . AMPscript
B . SSJS
C . SQL
D . HTML