elliptical usage

With their special moon vehicle, they could travel farther from the landing site to investigate more of the lunar environment and collect a wider range of soil and rock sample.

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Which of the following interpretation is right?

1) ....., they could travel farther from the landing site to investigate more of the lunar environment and (could) collect a wider range of soil and rock sample.

2) ....., they could travel farther from the landing site to investigate more of the lunar environment and (to) collect a wider range of soil and rock sample.

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