Answer:
To solve the problem, we first need to calculate the value of \( R \), which is defined as:
\[ R = 1 + 2 + 3 + \cdots + 10 \]
This is the sum of the first 10 positive integers. We can use the formula for the sum of the first \( n \) positive integers:
\[ S_n = \frac{n(n + 1)}{2} \]
where \( n \) is the number of terms. Here, \( n = 10 \). Plugging in this value:
\[ S_{10} = \frac{10(10 + 1)}{2} = \frac{10 \times 11}{2} = 55 \]
So, the sum \( R \) is 55. However, since none of the given choices (A, B, C) match this result, it seems there might have been a misunderstanding or an error in the options provided. The correct result is:
\[ R = 55 \]