Which is the least common way for modern writers to convey their themes?
a) through explicit statement
b) through development of a central conflict
c) through the values and motivations of the characters
d) through the thoughts of the characters

The least common way for the modern writers to convey their  themes is through the use of explicit statements. Option A is correct.

The theme in a story refers to the underlying message, or 'big idea' the author tries to convey. Tu put it simply,  theme may be the critical belief about life the authorattempts to express in the writing of a novel, play, short story or poem. This belief, or idea, goes beyond cultural barriers and is usually universal in nature.

some attention getter quotes to support your thesis regarding brain work could be the following: :

a. storage capacity of your brain is virtually unlimited.

b. your brain produces sufficient electricity to light-up a small bulb.

c. different brain circuits are involved with reading aloud or silently.

d. your brain by itself does not feel pain.

e. reading allows your brain to download info directly.

f. brains of two musicians performing together can synchronize.