Taking my first art history class - more narrow time frame or more broad?

I'm primarily interested in modern art - 1850s forward.

I'm trying to choose between two classes for the summer term:

• Modern Art History: Early 20th Century Art
• Global Art History III: Explores art from 1700s through the 21st century.

The descriptions for both are similar and have descriptions that include "[analysis] to reveal social, religious, political, economic and technological changes in societies, recognizing the impact of art and art history on the world today." The first class has a focus on modernism.

I can slog through the 17th century art of the 2nd course, and maybe I'll find it interesting. The first class seems more interesting if perhaps too narrowly focused.

Any advice appreciated.