An author's purpose usually must be inferred using clues from ...

[stevenposner]

An author's purpose usually must be inferred using clues from
 
  a. the material's context.
  b. the subject matter.
  c. the author's word choices.
  d. all of the above.

Question 2

In the sentence, Visitors to Chicago should include Millennium Park's fabulous Cloud Gate sculpture on their list of must-see attractions, the author's tone is best described as
 
  a. objective.
  b. enthusiastic.
  c. formal.
  d. concerned.

[mjenn52]

Answer to Question 1

d

Answer to Question 2

b