Yield of possible products from acid catalysed hydration of an alkene with a phenyl group
A basic principle in OChem says that stability of intermediate is the key factor in deciding the major product, in general. Another factor is stability of final product.

Will a kinetically favoured (minor) product (c) form?

It will form, as far as it's intermediate is known to exist (and it exists). However, that will be present in very minor amount, as the intermediate of it will not be as stable as that of (b) and (d). Additionally, the stable intermediate of (c) has 7 α-H, while that of (a) has 2 α-H, so product (c) will be major than product (a).

Here, (d) may be the major product due to high temperature.

The intermediates of (b) and (d) are equally stable. So, here we use the second factor. By looking at the structures of product (b) and product (d), we can say that (d) is major product due to extended conjugation and hyperconjugation with 9 α-H. Really?
The answer is YES. It is known that acid-catalyzed hydration reaction is highly exothermic$1$, which is why it is favored at low temperatures! (In accordance with the &quot;Le Chatelier's Principle&quot;, a system will consume heat when temperature of surrounding is raised).
Now, I think, it's pretty clear what the order of yield of products should be :)

References
$1$: https://en.wikipedia.org/wiki/Hydration_reaction#Alkenes