**Q**
"Karl Marx's book Capital has influenced many economists for many years."
Is the above claim true?
Options:
- yes
- no
**A**
yes
Capital (economics) is one of the foundational books of modern economic and socialist thinking.

**Q**
"Menstruation indicates that a woman is pregnant."
Is the above claim true?
Options:
- yes
- no
**A**
no
Menstruation typically indicates that a woman is not pregnant due to the shedding of the uterine lining.

**Q**
Is the following statement true?
"North KoreaUnited States relations focus on being considerate."
**A**
no
North KoreaUnited States relations are constantly being strained and pushed to new limits by leaders.