Thought about this again: D it is.
(1) True for square or for rhombus but every square is a rhombus, so sufficient
(2) Again true for square or for rhombus but every square is a rhombus, so sufficient
When they perpendicular bisectors they mean that all angles and all sides are equal, therefore it is a square. And a square is just a type of rhombus?
And for statement 2, when they say that all sides are equal, you can assume that it is a square therefore it is also a rhombus?
Is that the correct line of reasoning?
Thanks so much in advance