The correct options are B and C.
A. Sparta did practice slavery. In fact, slavery was an integral part of Spartan society. The Spartan economy relied heavily on the labor of enslaved people known as helots. Helots were the conquered people who served as agricultural laborers, allowing the Spartan citizens, known as Spartiates, to focus on military training and warfare.
B. Athens gave more power to the people. Athens is often regarded as the birthplace of democracy. While not everyone was eligible to participate in the government, Athenian citizens had the right to vote on important matters and hold public office. The Athenian government was a direct democracy, where decisions were made by the citizens themselves through a voting process.
C. Athens had a stronger focus on religion. Religion played a significant role in Athenian society. The Athenians worshipped a pantheon of gods and goddesses and held religious festivals and ceremonies throughout the year. The Athenian government supported religious practices and often intertwined religious elements with political events.
D. Spartans had a strong military culture and placed a high value on warfare. They were known for their militaristic society and rigorous military training. Sparta was more focused on military conquest and maintaining a highly disciplined and effective army than Athens. Spartan society was geared towards producing skilled warriors and maintaining military supremacy.