Solve Vertical Addition: 12 + 2 Step-by-Step

To solve this problem, we will follow these steps:

• Step 1: Align the numbers vertically by place value. We have:
  $\begin{array}{c} 12 \\ + \\ \phantom{0}2 \\ \hline \end{array}$

• Step 2: Start from the rightmost digits in the units column. Add $2$ (from the bottom number) to $2$ (from the top number).
  $\phantom{x}2 + 2 = 4$

• Step 3: Now, move to the next column. We have $1$ in the tens column only from the top number, so it's $1 + 0 = 1$.

• Step 4: Combine the sums from each column starting from the left to form the final answer: $14$.

Therefore, the solution to the problem is $14$, which corresponds to choice 4.