A rigid circular disk of radius \(R\) rotates in a horizontal plane about a fixed vertical axle through its center \(O\). The disk rotates counterclockwise as viewed from above, and its angular speed is increasing at a constant rate. Point \(P\) is located on the outer rim of the disk at its topmost position directly above center \(O\). Which of the following diagrams best represents the directions of the centripetal acceleration \(\vec{a}_c\), tangential acceleration \(\vec{a}_t\), and total linear acceleration \(\vec{a}\) of point \(P\) at this instant?