This question is incomplete because the options are missing; here is the complete question:
Read these headings from When Birds Get Flu and Cows Go Mad! by John DiConsiglio.
1968 Another Pandemic
1986 Don't Eat the Meat
1996 A Bad Burger
1997 When Birds Get Flu...
From the headings, the reader can conclude that this section of the text will be sorted by
why events took place.
what events took place.
when events took place.
where events took place.
The answer to this question is C. When events took place
Step-by-step explanation:
The headings from this text show the content is organized in chronological order, which is from the oldest event in 1968 (Another pandemic) to the most recent one in 1997 (When bird get flu). This implies the author decided to explain how the bird flu and mad cow disease evolved in time, and therefore, in this case, the content is sorted based on when events took place or chronological order considering years were used to organized the headings and content.