What is the syntax of an HTTP GET request using version $1\mathrm{.}0$ of HTTP$?\backslash$ra$.$ GET $/$path$/$filename HTTP$/1\mathrm{.}0\backslash \backslash$r

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$\backslash$rb$.$ GET domainname$/$path$/$filename$/$ HTTP$/1\mathrm{.}0\backslash \backslash$r

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$\backslash$rc$.$ GET HTTP$/1\mathrm{.}0/$path$/$filename$\backslash \backslash$r

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$\backslash$rd$.$ HTTP$/1\mathrm{.}0$ GET$/$path$/$filename$\backslash \backslash$r

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