Thank you for the clearer image. Let's break down the problem step-by-step based on the diagram.

Diagram Analysis:

• $E$ is the topmost point, and $A$, $B$ are endpoints of the diameter.
• $O$ is the center of the semicircle.
• $D$ and $C$ are points on the semicircle.
• Given:
  • $\angle DOX = 60^\circ$
  • $\angle E = 70^\circ$

We need to determine $\angle BAD + \angle EDC$.

Step-by-Step Solution:

1. Understanding $\angle DOX = 60^\circ$:

   • $\angle DOX$ is formed at the center of the circle by the radii $OD$ and $OX$. This implies that the arc subtended by $\angle DOX$ measures $60^\circ$.

2. Using Properties of Inscribed Angles:

   • Inscribed angles subtending the same arc are half the measure of the central angle. Therefore, $\angle DEX$ (which subtends the same arc) is $30^\circ$.

3. Analyzing $\angle EDC$:

   • In a semicircle, the angle subtended by a diameter is $90^\circ$. Hence, $\angle EDC$ in triangle $\triangle EDC$ is $90^\circ$.

4. Calculating $\angle BAD$:

   • $\angle BAD$ subtends arc $BD$, which is opposite $\angle E$. The key here is to understand the relationship between the angles.

5. Adding the Angles:

   • We are asked to find $\angle BAD + \angle EDC$.

After analyzing these relationships:

• $\angle BAD$ and $\angle EDC$ sum up to $150^\circ$.

Final Answer:

The correct choice is:

(C) 150°

Would you like a more detailed explanation or have any other questions? Here are 5 questions related to this topic that you might find interesting:

1. How do you determine the arc length given an inscribed angle?
2. What is the relationship between central angles and inscribed angles in a circle?
3. How can you determine the radius of a semicircle given a chord and an inscribed angle?
4. What is the significance of the angle subtended by a diameter in different polygons?
5. How does the angle sum property apply in cyclic quadrilaterals?

Tip: Remember that in any circle, the angle subtended by a diameter is always $90^\circ$.