create a form that has several pull down fields

Trying to create a form that has several pull down fields that are dependant on the results of the previousely selected value. For example:

1. Select field A: Car manufacturer
2. Select field B: Car Models (populate values based on results from selection A)
3. Select field C: Car Options (populate values based on the results from selection

It's also my understanding that Select2 (3.4.5) was designed to provide ajax coding to facilitate a solution for this programming issue. Can you elaborate further as to where such coding can be inserted (cb_module, cb_plug-in, etc.), so I may get these fields to interact with my CB forms.

CB has no such feature. The best you could do is show/hide fields or field options based off another field using CB Conditional. Another alternative is CB Query Field and its Query Select field, which pulls its options from a database query, but it is not dynamic based off another fields value unless there is a page load between usages to update the query.