Jerry is suffering from schizophrenia. his friends and family find it difficult to derive meaning from his speech although he follows grammatical rules while forming sentences. his speech comprises of random words and names which have no relation to the context of the situation. he coins new words that are not commonly accepted. which of the following best describes his speech?
a. digress. b. derailment. c. word salad. d. thought block.

Word salad

Explanation:

Schizophrenia is a severe medical condition in which a person used a word salad. Word salad is confused and not understood for others. It is the result of much mental illness. Word salad is only an unsystematic, unorganized and unintelligible word dictionary of mental patient. A normal person was not able to understand what the patient is going to speak or what he wants to say.  

Thus here in the above statement, Jerry is suffering from schizophrenia. This is a serious illness. Due to this Jerry is suffering from word salad.

i would say b. research typically uses a variety of sources

productive most commonly means: achieving or producing a significant amount or result.

explanation:

productive can also mean:

these depend on how the word productive is used. most likely productive will mean   achieving or producing a significant amount or result.