Carlos was born with cataracts in both eyes. Even though they were removed when he was 5, his lack of visual experiences during early childhood makes it likely that he has experienced:
a) a massive loss of sensory neurons
b) difficulty incorporating new experiences into existing schemas
c) an inability to conceive of object permanence
d) degeneration of neural connections in visual reception areas of the brain
e) an inability to develop heritable traits

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.