The correct answer is b. as long as
This builds a sentence whose realization depends on a fulfilled condition. Other options would create ungrammatical or nonsensical sentences.
His guilt about his mistreatment of the cat
When grocery shopping, you should have a list of needed items.
Hope this helps. :)
A procedural text<span> is a </span>text<span> which gives instructions on how to do something</span>
