Received a PM. I don't normally answer SC questions because it's not exactly my area of expertise... I specialize in RC and mainly CR

Here, the main answer is clear: A is correct because of the parallelism. You need to have all nouns in the construction: a machine, a system and a method.

I understand this confuses you slightly: why not have parallelism between devised xyz and codified xyz? The reason is simple: the parallelism with nouns has three elements (see above), while the parallelism with verbs has only two elements. This should tick the balance in favor of the noun parallelism - or at least that's my take at it...

the list actually has three items .
in llelism type s/c one has to be crystal clear regarding the list
here non underline part a system of land tenure is a part of list
and its a noun phrase
to llel this we need a noun phrase which is A

thephoenix wrote:the list actually has three items .
in llelism type s/c one has to be crystal clear regarding the list
here non underline part a system of land tenure is a part of list
and its a noun phrase
to llel this we need a noun phrase which is A

Thanks buddy! Have realized my mistake now.

Yes, the list is actually of three items. I thought the second one is a modifier for the first hence, asked this question. Again, I realize how important it is to read the question carefully ! I was very foolish to jump the gun just after gazing at the structure.

Thanks again!