In the sentence, certain words are in bold and numbered

Solution

In the sentence "All countries agree that the affordability (A)  polythene bag, despite its immense practicability (B) and ubiquitous (C)) as a container (E), has ballooned into a civic crisis (D)," the words that need to be swapped are (A) affordability and (C) ubiquitous . Here's why:

• The word ubiquitous is a common adjective used to describe something that is present everywhere. It modifies the word 'practicability' in the original sentence, which makes no sense. The word ubiquity (noun form of ubiquitous) would be a more suitable fit to describe a quality.
• The word affordability is a noun and fits the sentence better when swapped with ubiquity . The sentence then reads, "All countries agree that the polythene bag, despite its immense practicability and ubiquity as a container, has ballooned into a civic crisis.