If Alfred Marshall categorized the analytical periods of time, he supposed that in short run it is: (i) Not possible to vary technology and at least one resource is fixed and hence at least one kind of cost is as well fixed. (ii) Possible to move the resources from one industry to the other. (iii) Possible to vary technology, however at least one resource is fixed and as a result at least one form of cost is as well fixed. (iv) Possible to vary all the resources and costs, however not technology.
Find out the right answer from the above options.