Verified Answer :

A sentence in its simplest form is called a kernel
sentence. Kernel sentences are sentences containing only the subject and the
predicate omitting the rest of the words which are not needed anymore. There is
a thin line between kernel and simple sentences.

The correct option is: B. kernel

Harris distinguished in the set of grammatical sentences of a given language two complementary subsets: nuclear sentences (kernel sentences) and non-nuclear sentences (nonkernel sentences). Kernel sentences are sentences that contain only the subject and the predicate and the rest of the words are omitted.