The answer to this is letter A.
Answer:
The system has infinite solutions
Step-by-step explanation:
For a system of two linear equations it is always true that if one equation is a linear combination of another, then the system will have infinite solutions.
Suppose we have the following system:

If there is a number n for which it is fulfilled that

Then the system has infinite solutions.
In this case the system is:

Observe that:

Then 
The system has infinite solutions