Sort the Following Events to Reflect the Order in Which

Short Answer

Sort the following events to reflect the order in which they occur during engulfment of an antibody-coated microorganism by a neutrophil in the blood. Your answer would be a four-letter string composed of letters A to D only, e.g. DACB.
(A) Rho-GEF activation
(B) Activation of Fc receptors
(C) Local PI(4,5)P? production
(D) Local PI(3,4,5)P? production