Sam had to mix C. equal parts of the two chemicals for the experiment.
The other options just sound wrong. You need to use an adjective here, and B, D, and F aren't adjectives. A doesn't fit either.
To choke on something ..gagged is the past tense of gag
No summary provided, however,
annual plants are those that grows for one season and dies. an example of annual plants are corn,beans,and some flowers that blossoms during the rainy season and dies through winter and summer.
Perennial plants are those that persist from season to season and never dies. Usually the remain dormant when the weather is hostile and blossoms when the weather is conducive.
