The ornamental design for a carrier, as shown and described.
FIG. 1 is a perspective view of the carrier in accordance with an embodiment of the present invention;
FIG. 2 is a front elevational view of the carrier illustrated in FIG. 1;
FIG. 3 is a rear elevational view of the carrier illustrated in FIG. 1;
FIG. 4 is a right side elevational view of the carrier illustrated in FIG. 1;
FIG. 5 is a left side elevational view of the carrier illustrated in FIG. 1;
FIG. 6 is a top plan view of the carrier illustrated in FIG. 1; and,
FIG. 7 is a bottom plan view of the carrier illustrated in FIG. 1.
The broken line showing of the containers is included for the purpose of illustrating environmental structure only and forms no part of the claimed design.