The correct response regarding the likelihood of the properties of the two samples being the same or different would be:
a
The properties will likely be different because the repeating groups of atoms that make up each sample are different.
This response emphasizes that even if the samples might have similar components, differences in the structure or arrangement of these atoms can lead to different physical and chemical properties. The properties of substances are greatly influenced by the specific arrangement and bonding of their constituent atoms, not solely by the types or number of atoms present.