villain is 23/7.69/1.0 over 65 hands. hmmm, ace on the flop. Should i go c/c, c/f mode immediately or put him all-in right here given such a small SPR

PokerStars No-Limit Hold'em, $1.00 BB (9 handed) Poker-Stars Converter Tool from FlopTurnRiver.com (Format: FlopTurnRiver)

Button ($52.65)
Hero ($99)
BB ($127.45)
UTG ($31.35)
UTG+1 ($62.40)
MP1 ($44.40)
MP2 ($75.25)
MP3 ($129.20)
CO ($45.50)

Preflop: Hero is SB with K, K.
1 fold, UTG+1 raises to $4, 1 fold, MP2 calls $4, 1 fold, CO calls $4, 1 fold, Hero raises to $21, 1 fold, UTG+1 calls $17, MP2 folds, CO folds.

Flop: ($51) 7, A, 5 (2 players)
Hero ?