Please help !!

When a gas like the one shown is released into a room, it tends to fill the room. Kinetic molecular theory explains this by assuming
that

A) gas particles are heavy.

B) gas particles travel as individual atoms.

C) gas particles are extremely light

D) gas particles have no attraction for each other.

Imagine if during the cathode ray experiment, the size of the particles of the ray was the same as the size of the atom forming the cathode. which other model or scientific observation would have also been supported? 1. this would support dalton's postulates that proposed the atoms are indivisible because no small particles are involved. 2. this would support bohr's prediction about electrons moving in orbits having specific energy. 3. this would support bohr's prediction about electrons being randomly scattered around the nucleus in the atom. 4. this would support dalton's postulates that proposed that atoms combine in fixed whole number ratios to form compounds.