WeBWorK Standalone Renderer

Is the following sentence a tautology, a contradiction, or neither?
$5 + 5 = 10$
A. Contradiction
B. Tautology
C. Neither

Is the following sentence a tautology, a contradiction, or neither?
$5 + 5 = 11$
A. Contradiction
B. Tautology
C. Neither

Is the following sentence a tautology, a contradiction, or neither?
$x = 5 \:$ and $\: x \neq 5$
A. Contradiction
B. Tautology
C. Neither

Is the following sentence a tautology, a contradiction, or neither?
$x = 5 \:$ or $\: x \neq 5$
A. Contradiction
B. Tautology
C. Neither

You can earn partial credit on this problem.