The correct answer is "9 + 13".

Solution:
To find the correct answer, we find the sum of each expression by rounding (up or down) the addends.

At Option A:
Round the addends to the nearest tens and then add.

9  +   13  =  ?
↓          ↓
10  +  10  =  20

This expression has a sum nearly equal to 20.

At Option B:

23  +  38  =  ?
↓           ↓
20  +  40  =  60

This expression has a sum nearly equal to 60.

At option C:

42  +  78  =  ?
↓          ↓
40  +  80  =  120

This expression has a sum nearly equal to 120.

At the last option D:

9  +    69  =  ?
↓          ↓
10  +  70  =  80

This expression has a sum nearly equal to 80.

So, the desired answer is "9+ 13".