I would say only grams here as the other two choices seem to have indications of directionality which would make them vectors.
Grams and seconds.
Units such as meters, seconds, kilograms, and kelvin are examples of units that can only describe scalar quantities. These units do not have a direction associated with them and only quantify the magnitude of a physical quantity.
Units such as kilograms, seconds, and degrees Celsius can only describe scalar quantities. These units represent values that have magnitude but no direction, unlike vector quantities which require both magnitude and direction for complete description.
Grams and seconds are two completely different units of measure. Grams measure weight and seconds measure time. Therefore, there is no way of telling whether one is smaller than the other. However, grams are smaller than kilograms and seconds are smaller than minutes. ;)
I would describe their weight in grams.
grams
Mass is a measure of the amount of matter in an object. It is a scalar quantity, meaning it has magnitude but no direction. Mass is typically measured in units such as kilograms or grams.
grams
grams, kilogram.
grams
CGS units are the standard for the metric system; Centimetres, Grams, Seconds
Grams are one unit in which weight can be measured.