Choose a word similar to the group: Happy, Joyful, Elated.

C. CHEERFUL

Choose a word similar to the group: Bright, Luminous, Radiant.

C. SHINY

Fast, Quick, Rapid

B. SWIFT

Choose a word similar to the group: Calm, Peaceful, Serene.

B. TRANQUIL

Choose the word that is similar to the group: Happy, Joyful, Elated.

D. CHEERFUL