Which of these sentences exhibits proper capitalization?
a. next saturday afternoon, we are traveling to the great city of london.
b. next saturday afternoon, we are traveling to the great city of london.
c. next saturday afternoon, we are traveling to the great city of london.
d. next saturday afternoon, we are traveling to the great city of london.

The answer is A. This sentence capitalizes the first letter of the first word in the sentence, which is correct. It also has Saturday capitalized, and as Saturday is considered a proper noun, this is also correct. London, being a city, is another proper noun, therefore, it is necessary to have it capitalized. Sentence B can be identified as incorrect solely because 'afternoon' is capitalized. Afternoon is a noun, but not proper. Choice C makes the same mistake, as well as others. Finally, D capitalizes 'city,' which is not a proper noun. A proper noun is defined as a name that is used for a person, place, or organization.

Answerthe global climate during the paleogene departed from the hot and humid conditions of the late mesozoic era and began a cooling and drying trend which dispite having been periodically disrupted by warm periods such as the paleocene-eocene thermal maximum, persists today;