The metaphor 'infected by his passion' illustrates the profound impact Mr. Obi's enthusiasm for teaching has on Nancy, indicating the deep influence he has on her, making option C the correct answer.
The use of the metaphor 'infected by his passion' in paragraph 3 is an expressive way to demonstrate the profound impact that Mr. Obi's enthusiasm for teaching has on Nancy.
This metaphor suggests that Nancy has been so influenced by Mr. Obi's fervor that it has 'infected' her, indicating a deep and pervasive effect on her attitude towards teaching.
Since the metaphor clearly shows the transfer of Mr. Obi's passion to Nancy, the correct answer to the question would be C. show the extent of Mr. Obi's influence on Nancy.The metaphor 'infected by his passion' illustrates the profound impact Mr. Obi's enthusiasm for teaching has on Nancy, indicating the deep influence he has on her, making option C the correct answer.