In the stanza "Silly, simpering, sideways sellout! / You're neither man nor machine, but monstrosly more!" the following poetic elements are present:
B. Alliteration - The repetition of the initial 's' sound in "silly," "simpering," and "sideways" is an example of alliteration.
C. Enjambment - The phrase continues from the first line into the second without a pause or break, showing enjambment.
D. Assonance - There is repetition of vowel sounds, particularly the short 'i' sound in "silly," "simpering," and "sellout."
E. Rhythm scheme - While the rhythm is not explicitly listed, the emphatic wording and structure likely bring a rhythmic quality to the lines.
Based on these observations, you can clearly identify B (alliteration) and C (enjambment), and, to a lesser extent, D (assonance). The concept of a specific "rhythm scheme" isn't explicitly detailed in this short stanza.
So, in summary, the elements present are B (alliteration), C (enjambment), and D (assonance).