Citrus trees are angiosperms and dicots. which characteristic would citrus trees have?
a flower petals in multiples of three
b herbaceous or woody stems
c parallel veins on the leaves
d one cotyledon in the seed

Answer;
The characteristics that citrus tree have is herbaceous or woody stems.

Explanation;
Angiosperms are vascular seed plants in which the ovule is fertilized and develops into seeds that are enclosed in an ovary.
Citrus is a dicot angiosperms; and therefore possess all the characteristics of angiosperms, including the ability to flower. Citrus trees they have herbaceous stems and their height can vary between 5 to 16 m. 

B. herbaceous or woody stems. Citrus trees are dicots or dicotyledonous, meaning its seed has two embryonic leaves. The flowers have 5 (rarely 4) petals. Dicot plants like citrus have reticulate venation on the leaves, parallel veins can ve observed on monocot plants.