Read the Following Statements. Which One Is Correct

question 90

Multiple Choice

Read the following statements. Which one is correct?

• A) Half of the ten largest U.S. cities have elected black mayors.
• B) After the 2006 elections, just one senator was African American.
• C) Median income for African American families is 56 percent of the amount for non-Hispanic white families.
• D) All of the above statements are correct.

---

Definitions:

Singlet

In quantum mechanics, a state in which all electrons in an atom or molecule are spin-paired, leading to no net spin.

Triplet

A term in quantum mechanics referring to an electron configuration with three possible orientations, or a state with a spin multiplicity of three.

Spectral Data

Information obtained from analyzing the interaction of electromagnetic radiation with matter, used to determine composition, structure, and physical properties.

Quartet

In NMR spectroscopy, a signal that is split into four peaks, indicating an atom's hydrogen atoms are coupled to three equivalent neighboring hydrogens.