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

C. CHEERFUL

Choose a word similar to the group: Fast, Quick, Rapid.

B. SWIFT

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

C. SHINY

Choose a word similar to the group: 'calm, peaceful, tranquil'.

B. SERENE

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

D. CHEERFUL