To determine the result of the given line of code, we need to understand how string concatenation works:
1. The statement involves the `+` operator, which is used to concatenate two strings.
2. In this context, the strings "one" and "day" are being concatenated.
Step-by-Step Solution:
1. Take the first string, which is "one".
2. Add the second string, which is "day", immediately after the first without any space in between.
When these two strings are concatenated, the resultant string will be:
```
"oneday"
```
Therefore, the correct answer is:
```
oneday
```
