Here are the correct answers for the blanks in the passage:

**Question 10:** C. the most famous
- The phrase "among the most famous and influential figures" indicates that Van Gogh is one of the leading figures in Western art.

**Question 11:** A. struggle
- In this context, "Van Gogh struggled with mental illness" is the correct form to describe an ongoing or past issue he faced.

**Question 12:** A. despite
- "Despite selling only one painting during his lifetime" is the correct phrase that means even with this situation, he became popular posthumously.

So, the filled passage would read as follows:

"Vincent van Gogh was a Dutch post-impressionist painter who is among **the most famous** and influential figures in the history of Western art. Born on March 30, 1853, in the Netherlands, Van Gogh **struggled** with mental illness throughout his life, which often influenced his work. He is best known for his bold colors and expressive brushwork. Some of his most famous paintings include 'Starry Night,' 'Sunflowers,' and 'The Bedroom.' **Despite** selling only one painting during his lifetime, Van Gogh's work gained immense popularity after his death, and he is now celebrated for his contributions to modern art. His unique style and emotional depth continue to inspire artists and art lovers around the world."