People understand speech in the context of their accumulated experience.

Answer: Option A

Accumulated : gather together or acquire an increasing number or quantity of.
Scattered : occurring or found at intervals or various locations rather than all together.
Assemble : (of people) gather together in one place for a common purpose.
Partial : existing only in part; incomplete.
Bias : inclination or prejudice for or against one person or group, especially in a way considered to be unfair.

Antonym of Accumulated is Scattered