If selecting Bronze for the primary product, disable Silver and Gold Support products for the secondary options.

The Event on the Rule Set to trigger the rule should be Plan Selected.

IF:

Id = ___ (or Name = _____)

AND

Selected = True

THEN:

Deactivate Plans (select all Silver/Gold products from the drop-down options)

If selecting Silver for the primary product, automatically add the Silver Support product for the secondary option. 

The Event on the Rule Set to trigger the rule should be Plan Selected.

IF:

Id = ___ (or Name = _____)

AND

Selected = True

THEN:

Select Plans (select the Silver Support product from the drop-down options)