The ornamental design for a carrier, as shown and described.
FIG. 1 is a front view of a first embodiment of our design; and,
FIG. 2 is a front view of a second embodiment of our design that differs from the first embodiment in that additional unclaimed environmental structure is depicted.
The boundary lines (shown with alternating longer and shorter dashes) in the figures form a boundary (that may correspond to the shape that would be occupied by a financial transaction card supported by the carrier) that is not part of the claimed design but to which the claimed design may extend.
The dashed lines in the figures form no part of the claimed design. The dashed lines inside the mustache in FIGS. 1-2 represent an unclaimed detachment area. All other surface(s) or portion(s) of the carrier not shown in the figures or otherwise described in the specification, including the edges and back thereof, form no part of the claimed design.