Why should programmers avoid making the following comparison with float $x?x==0\mathrm{.}3$

Because $0\mathrm{.}3$ may not be exactly represented as $0\mathrm{.}3$

Because floats should not be compared with integers

Because variables should not be compared with literals

Because the $0\mathrm{.}3$ should come first: $0\mathrm{.}3==x$