Which of the following statements correctly describes the trend of electronegativity in the periodic table?

Electronegativity decreases from left to right across a period and decreases up a group.

Electronegativity increases from left to right across a period and increases down a group.

Electronegativity increases from left to right across a period and decreases down a group.

Electronegativity decreases from left to right across a period and increases down a group.