The conclusion can be that the creator was angry and malevolent when he made the tiger, but it comes as a wonder that the same creator made both him and the lamb. It is so absurd that the narrator himself asks the question whether it's possible that there are more creators than one.
The correct answer is D. it uses imperfect coordinating structure.
Parallelism refers to the use of the same word form throughout a particular sentence. So, in the example above, in order to achieve parallelism, we would need to change the word 'vacuuming' into 'to vacuum,' in order to keep the consistency with the other two verbs: 'to dust' and '(to) straighten up.'
My mother has a great admiration and belief in my father. (try this)