Learn English – “On the steps” vs “at the steps”

2a, 2c and 2d are definitely correct. They don't seem incorrect. However, I'm not so sure about 2b. Use 2a instead of 2b.

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There's a problem with this question, and these kind of tests. Any of the five choices make grammatical sentences in English.

One can argue that C is the best answer, as it talks about one action of running:

"run along the path, up the steps and into one's house."

But B is not incorrect, as one can

"run along the path, towards the steps and into one's house."

Maybe the steps are a landmark that shows the direction of the house.

Likewise, A, D and E do not make ungrammatical sentences. But one assumes they are not examples of the kind of sentence and use of prepositions that the test is testing.