Why is it important to write something in the subject line of emails? o a. because most email programs won't send emails without subject o b. because your recipient's email program will automatically file the o c. because it's unethical to send emails without subject lines o d. because your recipient might automatically delete your message lines email in the sent folder if you don't include a subject line or send it to the spam folder

The business cycle is the periodic but irregular up-and-down movement in economic activity, measured by fluctuations in real gross domestic product (gdp) and other macroeconomic variables. a business cycle is typically characterized by four phases—recession, recovery, growth, and decline—that repeat themselves over time. economists note, however, that complete business cycles vary in length. the duration of business cycles can be anywhere from about two to twelve years, with most cycles averaging six years in length. some business analysts use the business cycle model and terminology to study and explain fluctuations in business inventory and other individual elements of corporate operations. but the term "business cycle" is still primarily associated with larger (industry-wide, regional, national, or even international) business trends.

Ithink its 1e100 but im not sure.