The correct answer is A. 9.90%.
The formula for the expected rate of return is:
$r = d + g$
where $r$ is the expected rate of return, $d$ is the dividend yield, and $g$ is the constant growth rate.
In this case, $d = 3.4\%$ and $g = 6.5\%$. Substituting these values into the formula, we get:
$r = 3.4\% + 6.5\% = 9.90\%$
Therefore, the expected rate of return is 9.90%.
Option B is incorrect because it is the dividend yield, not the expected rate of return.
Option C is incorrect because it is the constant growth rate, not the expected rate of return.
Option D is incorrect because it is the sum of the dividend yield and the constant growth rate, not the expected rate of return.