Hi there! The answer is C.
We don't need to use the distributive property to solve this equation. Distributive property is generally used to work out parenthesis (when solving an eqiation).
[tex]3x + 1 + 2x = 2 + 4x[/tex]
Collect like terms
[tex]5x + 1 = 2 + 4x[/tex]
Collect variable terms on one side.
[tex]5x - 4x = 2 - 1[/tex]
Now our last step is isolating the variable (and in this case we can just do this by collecting like terms).
[tex]x = 1[/tex]
~ Hope this helps you!