Definition: Given a prompt and four completions, select the completion that is the most plausible in continuing or answering the prompt. This task is designed to test common sense and has various categories ranging between idioms, negated statements, polysemy, subject referencing, and quantitative reasoning. Generate either Completion A, Completion B, Completion C, or Completion D.
Input: Prompt: Bert teaches his friend Ernie basic algebra. Ernie 
Completion A: solves the quadratic equation. 
Completion B: writes a thesis paper the next day about calculus. 
Completion C: writes a new algorithm for finding eigenvalues. 
Completion D: finds the partial derivative of the Black Scholes equations.
Output:
Completion A