How can SSJS variables be referenced for content personalization? Choose 1.

Where can the SSJS Core library be used? Choose 2.

A developer needs to import a file into a data extension which contains transactional dat a. The file includes a column labeled Purchase_Price with values varying from '$.05' to '$100'.
What Data Type should be used to prevent loss of data'

A developer is building a landing page in Marketing Cloud and an email with a Call-To page will display personal information about the subscriber.
In which way could the developer create the CTA link?

Which AMPscript function group could most negatively Impact send processing?