Identify a Valid Trend Observed in U

question 131

Multiple Choice

Identify a valid trend observed in U.S. business cycles since 1933.

• A) Contractions lasted for more than two years on an average.
• B) There were only two or three complete cycles.
• C) There have been no recessions since 1979.
• D) Expansions generally lasted longer than contractions.
• E) Each cycle lasted longer than the previous one.

---

Definitions:

Isoelectric Line

The baseline of an electrocardiogram (ECG) where there is no electrical activity in the heart, representing the time between heartbeats.

Electrical Activity

Movements of electrons or ions that produce currents and voltages in biological systems, crucial for nerve and muscle function.

ECG

An electrocardiogram, a diagnostic tool that records the electrical activity of the heart to check for different heart conditions.

Q-T Interval

A measurement on an electrocardiogram (ECG) that represents the time between the start of the Q wave and the end of the T wave, indicating the time taken for ventricular depolarization and repolarization.