In the observations of the experiment of scattering of Alpha-particle, Rutherford concluded about the atom that

(A) the positive charge and the mass of the atom are concentrated at the center called the nucleus
(B) there is positive charge centralized at one point of the size about $10^{-10} m$ inside the atom
(C) the atom being electrically neutral, it must have negatively charged electrons moving around the nucleus in different orbits
(D) the nucleus is small, electrons move around, there is no space left empty inside the atom

Choose the correct answer from the options given below:

(A) and (C) only

The correct answer is Option (2) → (A) and (C) only