Answer:
The correct answer is option A.
Step-by-step explanation:
Reader should look at the CONTEXT to understand the meaning of challenging words. CONTEXT refers to surrounding words, state of affairs, circumstances, factors, and conditions that can help the reader to understand the meaning of certain words.
Challenging words not necessarily means "difficult words". On the contrary, they can be simple words that change their meaning according to who utter them or in which situation they are uttered.
For example, the expression "my mother" will change its meaning according to the speaker (unless they are brothers). This linguistic phenomenon is known as "DEIXIS".