The correct options are
A <!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}-->
Stem helps in conducting food material
C <!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}-->
Stem provides support to the plants
Stem is the part of the plant which provides support to the other parts of the plant. It also helps in conduction of water and food materials throughout the plants. Typically, the stems only support the plant body, however, in some plants, stems adapt themselves for storing food as well.