Since it's curling so close to the roots, probably 3a, possibly some 2c.
I've actually been playing around with Curl Keeper lately with really good results. Used alone it's a soft hold but reduces frizz, increases shine and defines curls. If I need a little extra hold I use a very small amount of a thin gel like Biotera mixed right in with the Curl Keeper. And I used Curl Keeper this week with minimal frizz during the current NY heat wave (dews were 69 at 10:30 this morning, temp was 87).
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3a/f/iii Before the chop- Donated to Locks of Love, January 2013
Modified CG since 11/5/11
CO-WASH: VO5 Vanilla Mint Tea Clarifying, DevaCare No-Poo
CLARIFY: CHS Treatment Shampoo (used prior to PT/DT)
RO: DevaCare One Condition, Regis Olive Oil
LI: Cure Care, As I Am Leave-In
STYLE: Re:Coil, Curl Keeper, Biotera Gel, Deva Ultra Defining Gel, GVP Liquid Sculpting Gel, Curls Rock Amplifier and Strong Hold Mousse
PT/DT: IAGirl's PT, One n' Only Argan Hydrating Mask