Love and loyalty to one’s motherland and mother-tongue are the cornerstone of one’s identity and self-esteem. Anyone who can’t love his country and national language can’t love anything and anyone in this world. It should be true I don't exactly understand your question
The answer is definitely C
Counteract it is.
Definition: do opposing action in this case fight the disease
Listen I would answer this for you, but there are programs that <em>all</em> English teachers <em>always</em> use to make sure you didn't just steal someone else's work. If somebody writes this paragraph for you and you take it for yourself that's called <u><em>Plagiarism</em></u>. And I don't want you to get into trouble for that since it <em>is </em>something very serious.